Data Analytics Practice Quiz

Moore's Law suggest that physical capacity and performance of computers doubles every two years

A person says that the probability of last year's championship team winning the title again is about 40%. Example of

One goal for a data analyst is to turn data into something easier to read and interpret, making it meaningful

Key starting point in a big data journey is?

Which of the following would result in the list of discrete random variables?

What is one challenge of big data quality?

A(n) ___ join requires that there is a record in both of the joined tables/columns/etc.

Two common formats for semi-structured data re

Which of the following is NOT one of the phases of Big Data adoption?

The most common application of data mining is

All of the following are common actions when cleaning data, except:

For those in big data, there is a high level of ___ among practitioners.

For a certain data set we have a mean of 100, a median of 95, and a standard deviation of 25. What is the z-score 138

Human-generated data may be ___ than the computer generated metadata that accompanies it.

Before you start, it is important to know what conditions can affect your mathematical calculations

Examples of variety of big data include ___ such as books,blogs, news articles, photos, tweets, and video.

___ is thought of as the consumer layer of crowd computing and includes web app that run entirely through the browser

Provide the range for this data set: 3, 5, 7, 10, 3, 3, 9, 2, 5, 10, 9

Data analysis is the process of ___ data for business decision-making

Which of the following numbers is NOT associated with the Empirical Rule?

Which of the following is a reason why data truth can be incorrect?

The central limit theorem says that most things we observe in nature and in our day to day life abide by ___.

What is the definition of confidentiality of data?

Big data is different than small data, if something goes wrong it's not easy to start the data set again, this is called

Which of the following is NOT a Big Data characteristic?

Which of the following is a key aspect of a Big Data platform?

What percentage of the data points in a data set should fall within 2 standard deviations of the mean?

In the world of data analysis, the second set of information is an example of

Velocity is a part of big data since it includes ___ from more than 18 billion networks.

A(n) ___ is a label for data, and a ___ ties values together into one entity.

Provide the median for this data set: 15, 11, 12, 3, 14, 17

4 Queens, 4 Jacks, 4 Kings. If the top card is a King, what's the probability the second card is a Queen, Jack, or King

A very large and static data set with a consistent format is an example of

Which of the following is NOT part of the big data platform?

Nearly 80% of database users use some form of

An example of big data that influences science includes Google

Provide the weighted average for these four numbers and their accompanying weight: 5(20%), 10(50%), 4(20%), 2(10%)

Six students earn the following test scores: 60, 70, 80, 90, 95, 100. The student that scored 95 is in the ___ percent

60 of 100 passed a test. 50 of 100 studied for the exam. 45 of the people who studied passed. Studying and Passing are

Provide the mean and median for this data set: 4, 6, 8, 10, 17

You have 3 coins. What is the probability that when all three coins are flipped, exactly 2 coins will result in heads

Use ___ detection when you need to know if something unusual happens and ___ when you know what you are looking for.

Cloud storage is ___. That means it can be rented on an as-needed basis without up-front cost for installation

In a probability density the area under the curve is equal to ___.

52 cards are in a deck, 4 Queens, 4 Jacks, 4 Kings. What is the probability that the top card is one of those?

Provide the mode for this data set: 3, 5, 7, 10, 3, 3, 9, 2, 5, 10, 9

Which of the following is a useful strategy or calculation to use when you are missing data?

Data which we did NOT collect, that may or may not include flawed data, is often called ___.

Analysts change data values

Hadoop is

Big data comes from a single reliable source of information?

What are the three "V's" of big data?

Each boy takes a ball out of a bowl. The bowl has 20% pink, 30% yellow, 15% green, and 35% orange. This is an example of

Using big data, companies can predict future trends to market and price their goods, this is true in the ___ industry.

With the advent of new technologies such as Hadoop and Spark, SQL will become obsolete. True or false?

Provide the standard deviation for this data set: 3, 6, 4, 11 (choose the closest answer)

According to the survey mentioned in this lesson, what is the main source of Big Data for many companies?

The process of loading data into software for analysis is called

Social Data Synthesis is one of the five Big Data Use Cases mentioned in the course

The three facets of data science are

Excel is the ___ most common application that data miners use.

Understanding record counts are something that is expected of more senior level analysts, rather than beginner analysts

Big data algorithms are so sophisticated that the processes almost ___ to consumers.

Although people want access to quality research, what is it that people do not want?